When Silas Herrick (Bryan Cranston) returns from a disastrous mission to Rexor IV he comes back a changed man. When Vera (Essie Davis) notices the changes, she likes the new him. When it seems that he could be a Rexorian though, will she give up the new better husband?
In Human Is we see Silas as an abusive husband in an unloving relationship. Emotionless and cold he pushes Vera to find comfort by other means. This is why his return from Rexor IV is so strange. He comes back as a loving man who gives her everything that she ever wants.